Machine for making blanks for narrow-necked bottles.



No. 893,180. PATENTED JULY 14, 1908. F. J. MAOKIN.

MACHINE FOR MAKING BLANKS FOR NARROW NEGKBD BOTTLES.

APPLICATION FILED JULY 19. 1907.

2 SHEETS-SHEET 2.

WITNESSES:

INVENTOR BY @Jf /727kfleL @ZZEY UNITED STATES PATENT OFFICE.

FRANCIS J. MACKIN, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE-HALF TO ILLINOIS- PACIFIC GLASS COMPANY, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION.

MACHINE FOR MAKING BLANKS FOR NARROW-NECKED BOTTLES.

Specification of Letters Patent.

Patented July 14, 1908.

To all whom it may concern:

Be it known that I, FRANCIS J. MACKIN, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful Improvements in Machines for Making Blanks for Narrow-Necked Bottles, of which the following is a specification.

My invention relates to bottle-making machinery and especially to machines for, and a method of, making narrow necked bottles.

More particularly the present invention pertains to a method of and a means for forming a blank for a narrow necked bottle so that the bottle may be blown subsequently by a blowing machine.

In the art of making bottles by machinery it has been a great problem heretofore how to make a narrow necked bottle. Numerous efforts have been made in this direction, but as far as I am aware from a considerable practical experience in this line of work, all these attempts have met with failure. The customary way to make a bottle is first to form the blank by means of a plunger inserted down into the gather in the mold, thereby pressing the molten glass outward into the neck ring for shaping the upper part of the bottle. This method will only work with bottles having a large neck opening whereby a plunger of considerable diameter and length can be used.

The object of the present invention is to provide a simple practical machine for the manufacture of narrow necked bottles in commercial quantities and at a minimum of ex pense.

The invention comprehends essentially the use of a mold for the blank into which the gather from the furnace is deposited, a suitable neck ring and means to close the top of the blank mold, and means operating from below to force the gather upward into the neck ring and around or against the closure in order to give shape to the blank whereby on the latter being placed in another mold it can be readily acted on by the blower to complete the bottle.

The drawings represent an apparatus suitable for practicing the invention: Figure 1 being a vertical section of the machine on line XX Fig. 2: Fig. 2 a plan view of the mold; and Fig. 3 a plan view of the neck ring.

A represents a suitably supported cylinder of any appropriate description. The admission and exhaust of air or any other suitable motive fluid to and from the cylinder is controlled by a suitable valve 2; air entering at 3 and exhausting at 4, and the valve 2 being adapted to bring the passages 34 successively into register with the port 5. The exhaust port 4 is normally closed by a spring pressed valve 6 by which a certain air pressure is always maintained in the cylinder to act as a cushion for the piston 7 which car ries the mold section 8.

The mold section 8 is preferably made in one solid casting with a central opening, in Which the gather 9 is adapted to be deposited. This mold section 8 is preferably detachably connected with the piston 7, and the piston and the bottom of the mold section have a central opening through which a fixed plunger or stud 10 is adapted to operate. Suitable packing, as 11, is provided to prevent leakage around the stud 10. The bore of section 8 in its lower portion is cylindrical, and corresponds with the shape of the stud 10. The upper portion of the bore of section 8 is preferably tapered to allow of the ready withdrawal of the blank after it has been operated upon by this machine.

Fixed to the section 8 or made integral therewith is a plate 12 forming a support for the movable mold sections 13. These sections 13 are fixed to respective slides 14, Fi 2, which are adapted to slide back and fort in suitable guides 15 on the plate 12. The simultaneous actuation of the sections 13 is effected by appropriate means, as the slotted lever handles 16, which are hinged to the late 12 at 17; the curved slots 18 in these evers being adapted to receive the pins 14 on the members 14. The sections 13 are locked together by appro riate means, as the latch member 19, pivote to one of the levers 16. The mold sections 13 are shaped on their insides corresponding with the contour to be given to the lower portion of the neck of the bottle. The sections 13 are stepped corresponding with the upper end of the section 8 to form a tight joint therewith when the sections are closed.

Cooperating With the sections 13 is a sec tional neck ring 20, the sections of which are pivoted together and preferably arranged to slide up and down on the pivot stud 21 and to have a movement towards and from the mold and crosswise thereof and independent of the mold, and at the same time to have a certain movement in unison with the mold. The sections of the neck ring 20 are opened and closed by suitable handles 22, one of which is hinged and provided with a latch member 23 in order to lock the sections together.

24 is a combined plunger and closure mem ber which is o erative in axial line with the mold and nee; ring when the parts are assembled and in closed position for operation. This plunger 24 may be actuated by any appropriate means, not necessary here to e shown. The lunger is preferably stepped corresponding y with the top of the neck ring, so as to form a snug fit therewith, and the end of the plunger has a reduced portion 25 of greater or less length which is adapted to pass downward through the neck ring for the urpose of forming a depression or chamber tor the receipt of the nozzle of a blowing machine.

In operation, the piston 7 and mold sec tion 8 are lifted into the osition shown in Fig. 1, the plunger 24 am: neck ring being raised out of interference with the initial opening and closing of the sections 13 to permit the deposit of the molten glass or gather into the open mouth of the section 8. The gather having been deposited therein, the sections 13 are closed and locked, the neck ring 20 closed and locked and dropped down into register with the top of the sections 13. The cock 2 having been turned to shut off the live air and permit exhaust to take place from the cylinder whenever the plunger exerts a SUfilClGIlt pressure on the air to overcome the tension of the spring of the valve 6, the plunger 24 is then set in operation to come down on top of the neck ring, so that all the parts stand in the osition shown in Fig. 1. Further downwar pressure then being exerted on the plunger, the entire neck ring, mold and piston 7 are moved down so that the gather 9 in the mold section 8 is forced upward by means of thefiXed stud 10 until the gather fills the entire space inclosed by the assembled parts. When the movable parts have reached their lowest point the blank is formed and is ready to be taken from the mold and transferred to any appropriate form of blowing machine. The withdrawal of the blank from the mold may be efiected in any appropriate manner. Commonly, the plunger 24 is retracted, the sections 13 opened up to free the blank and the neck ring then lifted vertically so that the blank will clear the mold; and then by movement to right or left of the neck ring which still remains closed on the plastic blank, the blank is moved around to the blowing machine where the operation of making the bottle is completed. The air is then turned into the cylinder to raise the piston 7 and its incumbent parts into initial position, and the operation is repeated.

Any appropriate means may be employed to effect the lifting of the neck rin independent of the air pressure in the cy inder. As merely illustrative of the principle, I have here shown the employment of a counterweight 26 for the purpose.

With respect to this invention, I consider the parts 8 and 13 as the mold, the mold simply being made in sections for convenience of operation; also that this mold constitutes a shape; and the neck ring and plunger 24 constitute closure means for one end of this shape, and the fixed stud or )lunger 10 constitutes a closure means for the opposite end of this shape. By bringing the two closure means closer together the space within the sha e is reduced to give contour to the bottle lank.

It is possible that various changes and modifications may be made in the mechanism herein described, without departing from the principle of the invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent 1S 1. The method of forming blanks for narrow necked bottles, which comprehends the deposit of the gather into a shape which is closed at the ends, and then moving the shape and one of said ends relatively to displace the gather and cause it to enter and be given a contour in the other closed end.

2. The method of forming blanks for narrow necked bottles which comprehends the deposit of the gather into a shape which is closed at the ends, then producing a relative movement of said shape and one of said ends to cause the gather to be thereby displaced and to enter the other end of the shape to contour the neck of the bottle, and to fashion a depression in the neck of the bottle blank.

8. The method of forming blanks for bottles, which comprehends fashioning a shape with a chamber closed at the ends and having one end contracted and fashioned to give contour to the proposed blank, and depositing the gather in said chamber, then moving the shape and one of its ends relatively to cause the gather to be displaced and to enter and be shaped in the said contracted end.

4. The method of forming blanks for hottles, which comprehends the deposit of the gather into a shape having a contracted closed end and supporting the gather upon one end of the shape, then moving the sha )e and the end which supports the gather re atively to displace the gather endwise relative to the shape and to cause the gather to enter and be fashioned in the contracted end of said sha e, and simultaneously with the said fashioning of the blank, forming a depression or chamber in the neck of the blank.

5. A machine for forming bottle blanks, which comprises a mold open at both ends, and adapted to have an endwise movement, a neck ring and a plunger to fit one end of the mold, a plunger fixed relative to the mold and adapted to fit the opposite end of the mold, and means for moving the mold and said last-named plunger relatively, for bringing the two plungers nearer together to reduce the space in the mold and give shape to the blank.

6. In a machine for forming bottle blanks, the combination of a hollow shape open at both ends, a closure for both ends, one of said closures being fixed relatively to the other plunger and the hollow shape which carries it, and means for reducing the space between the closures to give contour to the blank.

7. In a machine for forming bottle blanks, the combination of a hollow shape, closure means for each end of the shape, one of said closure means being stationary, and with respect to which the shape and the other closure means are movable.

8. In a machine for forming bottle blanks, the combination of a sectional mold open at the ends, a neck ring and a plunger member forming a closure for one end of the mold, a plunger member forming a closure for the other end of the mold and means for moving the mold and the first named lunger memher with respect to the secon named plunger member to reduce the space in the mold.

9. In a machine for making blanks for bottles, the combination of a sectional mold open at the ends, a neck ring and plunger operative to close one end of the mold, a fixed plunger to close the opposite end of the mold, said neck rin and its plunger and the mold being movab e with respect to the fixed plunger, said neck ring having a movement towards and from the mold.

10. In a machine for making blanks for bottles, the combination of a sectional mold open at the ends, a neck ring and plunger operative to close one end of the mold, a fixed plunger to close the opposite end of the mold, said neck rin and its plunger and the mold being movab e with respect to the fixed plunger, said neck ring having a movement vertically and horizontally, independent of the mold.

11. In a machine for making blanks for bottles, the combination of a sectional mold open at the ends, a neck ring and plunger operative to close one end of the mold, a fixed plunger to close the opposite end of the mold, said neck ring and its plunger and the mold being movable with respect to the fixed plunger, said mold carrying a piston member,

a cylinder in which the piston operates, and

means for admitting and exhausting a propelling medium to and from the cylinder to move the piston and mold.

12. A machine for molding bottle blanks, which comprises a cylinder, a piston movable in the cylinder, a mold section secured to the piston, a fixed lunger member piercing the piston and mo 01 and arranged concentric therewith, mold sections carried by the first named mold section and cooperating therewith to inclose a mold chamber, a neck ring fitting said mold sections, a closure for the neck ring, and means for admitting and ex hausting a propelling fluid into and from said cylinder.

13. A machine for molding bottle blanks, which comprises a cylinder, a piston movable in the cylinder, a mold section secured to the piston, a fixed lunger member piercing the piston and mo d and arranged concentric therewith, mold sections carried by the first named mold section and cooperating therewith to inclose a mold chamber, a neck ring fitting said mold sections, a closure for the neck ring, means for admitting and exhausting a propelling fluid into and from said cylinder, said neck ring having a movement in line with, and independent of, the mold.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

FRANCIS J. MACKIN.

Witnesses:

CHAS. E. TOWNSEND, S. H. NOURSE. 

